Hey, I'm able to buy a PC40 from 1993. But the machine has some issues. First of all the hydraulic oil level was too low, so i filled it to a higher level. After that the machine can't even move any cilinder. You can hear that the pump is giving more oil. After a few minutes the boom is moving. but is very shaky and slow. I think there is air in the system, but is this possible? I hope you can help me. My english is not very good, sorry for that.
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